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From Phil Steitz <>
Subject [math] RealMatrixImpl, DenseRealMatrix and MatrixUtils factory methods
Date Sat, 07 Feb 2009 19:34:32 GMT
I noticed a breakage in one of my apps that uses 
MatrixUtils#createRealMatrix(double[][], boolean).  This method seems to 
have been removed.  I guess this is because DenseRealMatrix can't 
support this.  I understand the value of DenseRealMatrix, but I still 
see value in the double[][]-backed RealMatrixImpl.  Any objections if I 
restore the method above, change the other factories to return 
RealMatrixImpl instances as before and add createDenseMatrix() 
methods?   I would also be OK with deprecating the createRealMatrix() 
methods and adding CreateXx methods for both versions.

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